Fluorescent penetrant inspection apparatus

Abstract

The fluorescent penetrant inspection apparatus comprises a wide area camera and a local area camera. The wide area camera captures an image of an object to be inspected. The wide area camera includes a first lens barrel. The local area camera includes a second lens barrel and a small ring light (an ultraviolet flaw detection lamp). The small ring light is disposed around the second lens barrel. The diameter of the small ring light is less than the diameter of the first lens barrel. And the second lens barrel has a barrel length longer than the first lens barrel.

1 . A fluorescent penetrant inspection apparatus comprising:
 a wide area camera that captures an image of an object to be inspected; and   a local area camera that captures an image of a part of the object in a region captured by the wide area camera;   wherein the wide area camera includes a first lens barrel configured to support an objective lens;   the local area camera includes a second lens barrel and an ultraviolet flaw detection lamp having a ring shape;   the second lens barrel supports an objective lens;   the ultraviolet flaw detection lamp is disposed around the second lens barrel;   the diameter of the ultraviolet flaw detection lamp is less than the diameter of the first lens barrel; and   the second lens barrel has a barrel length longer than the first lens barrel.   
     
     
         2 . The fluorescent penetrant inspection apparatus according to  claim 1 , further comprising:
 a robot arm moving the local area camera relative to the object to be inspected; and   a processor configured to control the robot arm;   wherein the processor extracts a shadow region at the time of capturing the image by the wide area camera based on design data of the object to be inspected; and   the processor includes the shadow region in a region to be captured by the local area camera.   
     
     
         3 . The fluorescent penetrant inspection apparatus according to  claim 1 , further comprising:
 a robot arm moving the local area camera relative to the object to be inspected; and   a processor configured to control the robot arm;   wherein the processor extracts a shadow region from an image captured by the wide area camera, and   the processor includes the shadow region in a region to be captured by the local area camera.   
     
     
         4 . The fluorescent penetrant inspection apparatus according to  claim 2 , wherein
 when the cross-sectional area of an opening to the shadow region exceeds the cross-sectional area of the ultraviolet flaw detection lamp, the processor inserts an end of the second lens barrel into the shadow region via the robot arm.   
     
     
         5 . The fluorescent penetrant inspection apparatus according to  claim 4 , wherein
 the local area camera captures an image inside of the shadow region a plurality of times with the end of the second lens barrel inserted into the shadow region; and   the ultraviolet flaw detection lamp changes an intensity of ultraviolet light in each image capturing.